Vinyl chloride monomer $($VCM$),$ which is used to manufacture PVC$,$ can be produced from acetylene and hydrogen chloride via the following reaction: A side reaction also occurs, producing dichloroethane $($DCE$)$ as an undesired by$-$product: C$\_(2)$H$\_(3)$Cl$\_($ vinyl chloride $)+$HCl$\_($ hydrogen chloride $)$C$\_(2)$H$\_(4)$Cl$\_(2)\_($ dichloroethane $)1\mathrm{.}1$ With reference to specific components in the system, recommend a scheme to minimise the undesired product $($DCE$).$ Justify your recommendation. $1\mathrm{.}2$ Draw up a table of the molecular weights and boiling points $($in deg C $)$ of the components in the system. List the boiling points from lowest to highest. $(4)1\mathrm{.}3$ Based on your answers in $1\mathrm{.}1$ and $1\mathrm{.}2,$ develop a preliminary process flow diagram $($PFD$)$ for the system. Provide your reasoning. $1\mathrm{.}4$ Plot a graph of the economic potential versus the selectivity. $\backslash$table$[[$Component$,$Value $(($$$)/($k$)$g$)$